Lamp.



m V w 5 0 N d e t n e t a DI N. 0 s N H o a 7 6 6 0 N LAMP.

(Application filed Apr. 12, 1899. Renewd Oct. 9, 1901.)

(No Model.)

INVENTOR WITNESSES ATTORNEYS NITED STATES PATENT FFICE.

NIS JOHNSON, OF MERIDEN, CONNECTICUT, ASSIGNOR, BY MESNE ASSIGN- MENTS, TO THE INCANDESCENT PETROLEUM LIGHT'COMPANY, OF ST. LOUIS, MISSOURI, A CORPORATION OF VEST VIRGINIA.

LAMP.

SPECIFICATION forming part of Letters Patent N o. 686,079, dated November 5, 1901. Application filed April 12, 1899. Renewed October 9, 1901! Serial No. 78.131. (No model.)

1 T 00% whom it may concern.-

Be it known that I, NIs JOHNSON, a citizen of the United States, residing at Meriden, in the county of New Haven and State of Connecticut, have invented certain new and useful Improvements in Gasifiers for Incandescent Oil-Lamps; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable oth- 1o ers skilled in the art to which it appertains to make and use the same.

My invention relates to improvements in gasifiers for incandescent oil-lamps of the class which produce light through the heatin the drawings which accompany and form a part of this specification, in which the same reference-numerals indicate the same or corresponding parts, and in which- Figure 1 is a central vertical section of a lamp-burner containing my improved gasifier, and Fig. 2 is a central vertical section 3 5 of a gasifier differing slightlyin construction from the gasifier shown in Fig. 1 and, which may be used interchangeably with said latter gasifier.

In the drawings, 1 designates the central 4b draft-tube or inner wick-tube of the lamp; 2, the outer wick-tube; 4, the skirt of the burner, and 5 the chimney-gallery.

3 is a sleeve surrounding the upper portion of the wick-tube, extending up into the space between the hereinafter-mentioned gasifier and the draft-chimney and seated in a groove in the skirt 4. The use of this sleeve 3 is covered in my application for improvements in lamp-burners, filed January 11, 1899, Se-

rial No. 701,781. The sleeve is so shaped as to form a contracted draft-collar, which concentrates the currents of air to the extent necessary-for the production of a non-luminous flame.. The mantle is supported from the sleeve by a rod 8.

The gasifier 10 consists of a hollow shell 11, having a conveXly-curved dome-shaped top and open at the bottom. It is supported by a spindle 12, fitting within a suitable socket within the central draft-tube 1. The shell 11 has at the bottom an inwardly and upwardly extending deflecting-flange 13, located substantially over the wick. The lower portion of the shell 11 is imperforate, but in the upper curved portion perforations for the escape 6 5 of combustible gases are provided. The inwardly and upwardly extending flange 13 may be extended upward, so as to form a tube surrounding the stem 12, screening to a certain "extent the openings in the outer shell, and this tube may be perforated, all as shown in Fig. 2. It is found that when the lamp is in use most ,of the combustible gases issue from the lowermost holes in the outer shell of the gasifier, and the perforations in the inner tubular portion of the part 13 therefore serve to mix, difiuse, and distribute the combustible gases and air. Both of these forms of gasifiers produce a very even and steady flame issuing in thebest mannerfor heating the mantle. The shell 11 may be spun from a single piece of metal or may be stamped by dies, and hence may be made very cheaply.

In the operation of the lamp air to supply the flame enters through perforations in the head 6 at the bottom of the skirt 4 and also through perforations 1% near the upper part of the skirt (these perforations being shielded by a collar 16) and thence passes through the sleeve 3. Combustible gases rising from the go wick pass into the gasifier 10, being there mixed with air rising through the central draft-tube 1, and then pass outward through the perforations in the shell 11 of the gasifier and burn with a blue or substantially color- 5 less flame, which heats the mantle to incandescence.

Having thus completely described my in vention, what I claim, and desire to secure by Letters Patent, is-

a team 1. In a lamp, the combination, with draft and Wick tubes, of a gasifier consisting of a hollow shell having a convexly-curved domeshaped top, said shell being open at the bottom, being provided with upwardly and outwardly directed perforations, in the inclined portion of its dome-shaped top, for the escape of combustible gases, and being located over the wiclctube of the lamp with its bottom opening above the top of such wick-tube.

2. A gasifier of the type described, consisting of a hollow she'll havinga conveXly-curved dome-shaped top, said shell being open at the bottom, being provided with upwardly and outwardly directed perforations, in the inclined portion of its dome-shaped top, for the escape of combustible gases, and being adapted to be placed over the wick-tube of a lamp with its bottom opening above the top of the wick-tube.

3. A gasifier of the type described, consisting of a hollow perforated shellopen at the bottom and provided with an inwardly-ex.- tending deflecting-flange, and with a tubular portion extending upward into the interior of the shell, said'gasifier being adapted to be placedover the top of the wick-tube of a lamp with its bottom opening above the top of such Wick-tube.

4:. A gasifier of the type described, consisting of a hollow perforated shell open at the bottom and provided with an inwardly-extending deflecting-flange, and with a perforated tubular portion extending upward into the interior of the shell, said gasifier being adapted to be placed over the top of the wicktube of a lamp with its bottom opening above the top of such wick-tube.

In testimony whereof I hereunto affix my signature in the presence of two witnesses.

NIS JOHNSON.

\Vitnesses:

WILBUR F. DAVIS, WILLIAM G. MUELLER. 

